/* Flush all traces. */
int lj_trace_flushall(lua_State *L)
{
jit_State *J = L2J(L);
ptrdiff_t i;
if ((J2G(J)->hookmask & HOOK_GC))
return 1;
for (i = (ptrdiff_t)J->sizetrace-1; i > 0; i--) {
GCtrace *T = traceref(J, i);
if (T) {
if (T->root == 0)
trace_flushroot(J, T);
lj_gdbjit_deltrace(J, T);
T->traceno = 0;
setgcrefnull(J->trace[i]);
}
}
J->cur.traceno = 0;
J->freetrace = 0;
/* Clear penalty cache. */
memset(J->penalty, 0, sizeof(J->penalty));
/* Free the whole machine code and invalidate all exit stub groups. */
lj_mcode_free(J);
memset(J->exitstubgroup, 0, sizeof(J->exitstubgroup));
lj_vmevent_send(L, TRACE,
setstrV(L, L->top++, lj_str_newlit(L, "flush"));
);
/* Check trace argument. Must not throw for non-existent trace numbers. */
static GCtrace *jit_checktrace(lua_State *L)
{
TraceNo tr = (TraceNo)lj_lib_checkint(L, 1);
jit_State *J = L2J(L);
if (tr > 0 && tr < J->sizetrace)
return traceref(J, tr);
return NULL;
}
/* Check trace argument. Must not throw for non-existent trace numbers. */
static Trace *jit_checktrace(lua_State *L)
{
TraceNo tr = (TraceNo)lj_lib_checkint(L, 1);
jit_State *J = L2J(L);
if (tr > 0 && tr < J->sizetrace)
return J->trace[tr];
return NULL;
}
/* Start profiling. */
LUA_API void luaJIT_profile_start(lua_State *L, const char *mode,
luaJIT_profile_callback cb, void *data)
{
ProfileState *ps = &profile_state;
int interval = LJ_PROFILE_INTERVAL_DEFAULT;
char *flavour;
while (*mode) {
int m = *mode++;
switch (m) {
case 'i':
interval = 0;
while (*mode >= '0' && *mode <= '9')
interval = interval * 10 + (*mode++ - '0');
if (interval <= 0) interval = 1;
break;
#if LJ_HASJIT
case 'l': case 'f':
L2J(L)->prof_mode = m;
lj_trace_flushall(L);
break;
#endif
case 'S':
{
int k;
if (sscanf (mode, "[%m[^]]]%n", &flavour, &k) > 0)
mode += k;
}
default: /* Ignore unknown mode chars. */
break;
}
}
if (ps->g) {
luaJIT_profile_stop(L);
if (ps->g) return; /* Profiler in use by another VM. */
}
ps->g = G(L);
ps->interval = interval;
ps->cb = cb;
ps->data = data;
ps->samples = 0;
ps->flavour = flavour;
lj_buf_init(L, &ps->sb);
profile_timer_start(ps);
}